3 Commits
4 changed files with 80 additions and 10 deletions
+6 -3
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@@ -5,9 +5,12 @@ import "os"
var Home, _ = os.UserHomeDir()
const (
AnsiBold = "\033[1m"
AnsiError = "\033[38;5;9m"
AnsiReset = "\033[0m"
AnsiBold = "\033[1m"
AnsiError = "\033[38;5;9m"
AnsiWarning = "\033[38;5;3m"
AnsiBlue = "\033[38;5;4m"
AnsiGreen = "\033[38;5;2m"
AnsiReset = "\033[0m"
ErrorRead = 101
ErrorWrite = 102
+3 -3
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@@ -1,7 +1,7 @@
module github.com/rwinkhart/go-boilerplate
go 1.24.3
go 1.25.5
require golang.org/x/term v0.32.0
require golang.org/x/term v0.38.0
require golang.org/x/sys v0.33.0 // indirect
require golang.org/x/sys v0.39.0 // indirect
+4 -4
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@@ -1,4 +1,4 @@
golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
golang.org/x/term v0.32.0 h1:DR4lr0TjUs3epypdhTOkMmuF5CDFJ/8pOnbzMZPQ7bg=
golang.org/x/term v0.32.0/go.mod h1:uZG1FhGx848Sqfsq4/DlJr3xGGsYMu/L5GW4abiaEPQ=
golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=
golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
golang.org/x/term v0.38.0 h1:PQ5pkm/rLO6HnxFR7N2lJHOZX6Kez5Y1gDSJla6jo7Q=
golang.org/x/term v0.38.0/go.mod h1:bSEAKrOT1W+VSu9TSCMtoGEOUcKxOKgl3LE5QEF/xVg=
+67
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@@ -0,0 +1,67 @@
package stringy
import (
"crypto/rand"
"fmt"
"math"
"math/big"
"strings"
)
// StringGen generates a random string of a specified length and complexity.
// Requires: complexity (minimum percentage of special characters to be returned in the generated string; set to 0 to generate a simple string),
// complexCharsetLevel (1 = safe for filenames, 2 = safe for most password entries, 3 = safe only for well-made password entries)
func StringGen(length int, complexity float64, complexCharsetLevel uint8) string {
var actualSpecialChars int // track the number of special characters in the generated string
var minSpecialChars int // track the minimum number of special characters to accept
var extendedCharset string // additions to character set used for complex strings
charset := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" // default character set used for all strings
const extendedCharsetFiles = "!#$%&+,-.;=@_~^()[]{}`'" // additional special characters for complex strings (safe in file names)
const extendedCharsetMostPassword = "*:><?|" // additional special characters for complex strings (NOT safe in file names)
const extendedCharsetSpecialPassword = "\"/\\" // additional special characters for complex strings (NOT safe in file names)
if complexity > 0 {
minSpecialChars = int(math.Round(float64(length) * complexity)) // determine minimum number of special characters to accept
switch complexCharsetLevel {
case 1:
extendedCharset = extendedCharsetFiles
case 2:
extendedCharset = extendedCharsetMostPassword + extendedCharsetFiles[:len(extendedCharsetFiles)-9]
case 3:
extendedCharset = extendedCharsetFiles + extendedCharsetMostPassword + extendedCharsetSpecialPassword
}
charset += extendedCharset
}
// loop until a string of the desired complexity is generated
for {
// generate a random string
result := make([]byte, length)
for i := range result {
val, _ := rand.Int(rand.Reader, big.NewInt(int64(len(charset))))
result[i] = charset[val.Int64()]
}
// return early if the string is not complex
if complexity <= 0 {
return string(result)
}
// count the number of special characters in the generated string
for _, char := range string(result) {
if strings.ContainsRune(extendedCharset, char) {
actualSpecialChars++
}
}
// return the generated string if it contains enough special characters
if actualSpecialChars >= minSpecialChars {
return string(result)
}
// reset special character counter
fmt.Println("Regenerating string until desired complexity is achieved...")
actualSpecialChars = 0
}
}